Workmen's compensation,
Ychwanegu i'r clipfwrdd
Workmen's compensation,
Windingmen's Conciliation Board,
Ychwanegu i'r clipfwrdd
Windingmen's Conciliation Board,
Winding enginemen's wages agreement,
Ychwanegu i'r clipfwrdd
Winding enginemen's wages agreement,
Winding enginemen's wages agreement,
Ychwanegu i'r clipfwrdd
Winding enginemen's wages agreement,
Winding enginemen's time agreements,
Ychwanegu i'r clipfwrdd
Winding enginemen's time agreements,
Winding enginemen's time agreement,
Ychwanegu i'r clipfwrdd
Winding enginemen's time agreement,
Winding enginemen's agreement,
Ychwanegu i'r clipfwrdd
Winding enginemen's agreement,
Winding enginemen: wages,
Ychwanegu i'r clipfwrdd
Winding enginemen: wages,
Winding enginemen Time Agreement 1910,
Ychwanegu i'r clipfwrdd
Winding enginemen Time Agreement 1910,
Winding enginemen: new appointments,
Ychwanegu i'r clipfwrdd
Winding enginemen: new appointments,
Winding enginemen: hours,
Ychwanegu i'r clipfwrdd
Winding enginemen: hours,
Winding enginemen Agreement 1915,
Ychwanegu i'r clipfwrdd
Winding enginemen Agreement 1915,
Welsh newspapers,
Ychwanegu i'r clipfwrdd
Welsh newspapers,
Welfare Fund levy,
Ychwanegu i'r clipfwrdd
Welfare Fund levy,
Weighing facilities at collieries,
Ychwanegu i'r clipfwrdd
Weighing facilities at collieries,
Weekend Work and War Bonus Award,
Ychwanegu i'r clipfwrdd
Weekend Work and War Bonus Award,
Water in mines,
Ychwanegu i'r clipfwrdd
Water in mines,
Wartime training, skilled men in Army,
Ychwanegu i'r clipfwrdd
Wartime training, skilled men in Army,
War wage for firemen,
Ychwanegu i'r clipfwrdd
War wage for firemen,
War Damage Bill and standage charges,
Ychwanegu i'r clipfwrdd
War Damage Bill and standage charges,
Canlyniadau 1 i 20 o 1638